Initial import.

[mirror_edk2.git] / MdePkg / Library / BaseLib / ia32 / RRotU64.asm

;------------------------------------------------------------------------------\r
;\r
; Copyright (c) 2006, Intel Corporation\r
; All rights reserved. This program and the accompanying materials\r
; are licensed and made available under the terms and conditions of the BSD License\r
; which accompanies this distribution.  The full text of the license may be found at\r
; http://opensource.org/licenses/bsd-license.php\r
;\r
; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
;\r
; Module Name:\r
;\r
;   RRotU64.asm\r
;\r
; Abstract:\r
;\r
;   64-bit right rotation for Ia32\r
;\r
;------------------------------------------------------------------------------\r
\r
    .686\r
    .model  flat,C\r
    .code\r
\r
InternalMathRRotU64 PROC    USES    ebx\r
    mov     cl, [esp + 16]\r
    mov     eax, [esp + 8]\r
    mov     edx, [esp + 12]\r
    shrd    ebx, eax, cl\r
    shrd    eax, edx, cl\r
    rol     ebx, cl\r
    shrd    edx, ebx, cl\r
    test    cl, 32\r
    cmovnz  ecx, eax\r
    cmovnz  eax, edx\r
    cmovnz  edx, ecx\r
    ret\r
InternalMathRRotU64 ENDP\r
\r
    END\r